dorsal fin
dorsal fin The unpaired fin located on the back (dorsal surface) of both bony fish and sharks. It may be single and soft-rayed, as in trout, or double with the anterior dorsal fin supported by fin spines, as in perch. In some species (e.g. eels) the dorsal fin is confluent with the tail fin.
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Cichlid , Cichlidae (cichlids; subclass Actinopterygii, order Perciformes) A very large family of freshwater fish, many of which are rather deep-bodied. They h… Actinopterygians , Holostei Group of marine and fresh water bony fish including many fossil species, e.g. Lepidotes (Triassic—Cretaceous), and Dapedius (Jurassic). Holo… Heterocercal Tail , Skip to main content
heterocercal tail
heterocercal tail In fish, a tail in which the tip of the vertebral column turns upward, extending into the do… Perch , Perch
Perch are fish belonging to the class Osteicthyes, whose members have a bony skeleton rather than on made of cartilage. Bony fish comprise the… Silversides , Atheriniformes (class Osteichthyes, subclass Actinopterygii) An order of bony fish that includes fairly large marine individuals (e.g. the flying fis… Shellfish , shellfish A wide range of marine molluscs (abalone, clams, cockles, mussels, scallops, oysters, whelks, winkles) and crustacea (members of the zoolog…
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dorsal fin